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// Implementation of a Linked List
//
// TODO: recursive implementation for list_free()
//
#include <stdio.h>
#include <stdlib.h>
#include "list.h"
Node* node_init(int value) {
Node* n = (Node*) malloc(sizeof(Node));
n->value = value;
n->next = NULL;
return n;
}
void list_print(Node* head) {
if (head == NULL) {
puts("list is NULL");
return;
}
Node* node = head;
printf("[ ");
while (node != NULL) {
printf("%i ", node->value);
node = node->next;
}
printf("]\n");
}
void list_vprint(Node* head) {
Node* node = head;
while (node != NULL) {
printf("[*] %i\n", node->value);
node = node->next;
printf(" |\n");
}
printf("[/] %s\n", (char *)node);
}
int list_get(Node* n, int index) {
Node* m = n;
if (index > list_length(n)-1) return -1;
for (int i=0; i<index ; ++i) m = m->next;
return m->value;
}
void list_set(Node* n, int index, int value) {
if (index > list_length(n)) {
puts("Error: Setting list out of bounds");
return;
}
Node *m = n;
for (int i=0; i<index ; ++i)
m = n->next;
m->value = value;
}
int list_length(Node* head) {
Node* n = head;
int i = 0;
for (; n != NULL; ++i) n = n->next;
return i;
}
void list_push(Node** head, int value) {
Node* n = node_init(value);
n->next = *head;
*head = n;
}
int list_pop(Node** head) {
int val = (*head)->value;
*head = (*head)->next;
return val;
}
void list_append(Node** head, int value) {
Node* n = *head;
while (n->next != NULL) n = n->next;
n->next = node_init(value);
}
void list_insert(Node** head, int value, int index) {
Node* n = *head;
Node* cur = NULL;
Node* node = node_init(value);
int i = 0;
while (n->next != NULL && i < index) {
cur = n;
n = n->next;
++i;
}
cur->next = node;
node->next = n;
}
void list_free(Node** head) {
while (*head != NULL) {
Node* n = *head;
n->value=0;
*head = (*head)->next;
free(n);
}
*head = NULL;
}
int list_rm(Node** head, int index) {
Node* n = *head;
Node* cur = NULL;
if (index == -1) {
while (n->next != NULL) {
cur = n;
n = n->next;
}
} else {
int i = 0;
while (n->next != NULL && i < index) {
cur = n;
n = n->next;
++i;
}
}
cur->next = n->next;
int val = n->value;
free(n);
return val;
}
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